DE75782C - Changing device for magazine cameras - Google Patents

Description

IMPERIAL

PATENT OFFICE.

PATENT LETTERING

CLASS 57: Photographs.

THOMAS LOUKOTA in PRAGUE. Changing device for cameras.

Patented in the German Empire on April 19, 1893.

The present invention relates to a device for changing the plates photographic cameras. Of the. the. Construction of this device underlying The idea is that the stored in a magazine (rotatable about a hinge) Plates turned from their vertical position during exposure to the horizontal position a pin arranged on a lever and guided in a guide during the rotating movement of the magazine pushes the foremost plate out of the magazine and the nearest plate would take the place of the one pushed out, while the pushed out plate is the last to be put back into the magazine.

The movements of the magazine are controlled by the spindle on the outer wall of the Camera arranged screw nut produced by placing this spindle in a horizontal position Guide slot is lifted back and forth. . '

The attached drawing shows the device and its mode of operation: FIG. 1 shows a longitudinal section through the center of the camera, the front cover and objective have been removed. Fig. 2 shows the outline with the upper cover plate removed. 3 is a side view with the rear wall removed. Fig. 4 is a section along xx through Fig. 2. Fig. 5 is the same section as Fig. 1, but the magazine is moving and is already inclined. 6 shows the magazine in a horizontal position as the movement progresses. Fig. 7 shows the magazine moving back from the horizontal to the vertical position.

Fig. 8 shows in section the magazine with folded over Locking plate. Fig. 9 is a view of the camera. The remaining figures represent individual ones Part .ar.

The magazine A consists of two cut-out side panels a, a bottom panel b _{r of} the front enclosure c, a locking panel d and a top bar e. The plates α b, bar e and border c are firmly connected to each other, while the closure plate d around a hinge '^! is rotatable and can be fixed by means of two resilient bolts cP in holes d ^{3 of the side plates.}

The magazine can be rotated about the hinge / (see also Fig. 10) in such a way that on the one hand the bolt / ^{1 of} the hinge is guided on a bar g , on the other hand the bolt g by means of the plate / 7 (Fig. 11) with the "The screw nut i located on the outer side wall is connected. On the side walls α there are pins k which slide in a guide groove a ^{1 of} the guide piece B , which can be ^{rotated around a bolt α 2} in the cutout a ^{3 of} the side wall of the camera, the side plates a have a groove / which protrudes forwards at the bottom and in which a ^{pin Z 3} attached to the arm P ^{rotatable about Z 1} slides.

The plates P are inserted into the magazine from the rear of the camera after the shutter plate d has been opened (Fig. 8). The magazine is then closed and the locking plate is fixed by ^{means of the bolt d 2.} Two leaf springs m arranged on the closure plate press the plates P firmly together so that they press against the front enclosure c .

If you want to prepare a new exposure after the front plate has been exposed, you only need that. Guide the nut i vigorously to the end once forwards and once backwards in the groove z ¹ .

The process is as follows:

The bolt / ^{1 of} the hinge / slides in the guides g ″ and h, while the pins k are guided in the guide grooves α ¹ and cause the magazine to be turned over. In the meantime, the pin I ^{s of} the arm / ² slides in the groove /, engages under the foremost plate (Fig. 12) and pushes it out of the magazine (see Fig. 5), so that when the magazine finally reaches the horizontal position, it falls down behind the magazine to the floor of the camera (see Fig. Fig. 6).
. If the magazine is now to be brought into the vertical position again, the screw nut i is returned in the slot i ¹ , whereby the plate that has fallen to the ground, the upper end of which is supported by the leaf springs η, is pressed in between the leaf springs m and the stack of plates P. (See Fig. 7), the springs 0 causing them to be pushed completely into the magazine.

With the hinge d ^{l of} the Versehlufsplatte d a cross piece ρ is rotatably arranged independently of this, which has a resilient pin p ¹ , which, when the magazine is turned over, on the plate j? ² the camera slides and causes the cross piece ρ to be pressed firmly against the stack of plates ρ , so that the pin I ^s can more securely engage under the plate.

At the end of the movement, the pin p ³ lies in the notch q. . When the magazine is pushed back, the pin p ¹ , which can be rotated about a hinge and is movable in this one direction, turns over so that the pressure of the cross piece ρ on the stack of plates ceases and the pin / ³ can move freely .

The magazine is locked in the vertical position by means of the screw nut i, which is tightened firmly.

In order to be able to change the distance between the objective and the foremost plate, a known device is used, consisting of a screw spindle r (Fig. Ga), the rotation of which moves a carriage r ¹ forwards or backwards and there the same on the inner wall the camera terminates in a pin r ² (Fig. 2), which enables the magazine to be set in various positions by leaning ^{the side plates of the magazine against said pin r 2.}

The pin s of the carriage r ¹ engages in the groove s * (Fig. 9 b) of the guide piece s' ² , which is provided with a pointer on the front side of the cover plate, which the latter on the division t indicates the distance, which is set in each case.

The screw nut i must be tightened for each recording, while it is loosened when changing the plates so that its spindle can be pushed back and forth in the slot.

When regulating the distance between the objective and the plate, the screw nut must be loosened, and after this distance has been regulated by the washer r (Fig. 9a), the magazine is pulled up to the pin r ^{2 by} means of the screw nut i .

Claims (1)

Patent claim: Changing device for magazine cameras, characterized in that a magazine (AJ rotatable about a hinge (f) is brought from the vertical to the horizontal position and vice versa when the camera is moved in the longitudinal direction, because pins (k ) slide in correspondingly shaped and rotatably arranged guide grooves (a ^l ) , while pins (I ³ ), which sit on rotatable arms (P) and are guided in slots (I) in the side walls (a) of the magazine, when moving and folding the Grip the latter under the foremost plate and push it out of the magazine, whereupon the evacuated plate is pushed back into it as the rearmost plate with the aid of leaf springs (n and 0) when the magazine moves back. 1 sheet of drawings.